EP2152556B1 - Silencer - Google Patents

Silencer Download PDF

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Publication number
EP2152556B1
EP2152556B1 EP08749142.9A EP08749142A EP2152556B1 EP 2152556 B1 EP2152556 B1 EP 2152556B1 EP 08749142 A EP08749142 A EP 08749142A EP 2152556 B1 EP2152556 B1 EP 2152556B1
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EP
European Patent Office
Prior art keywords
fibrous material
pot
layer
housing
silencer according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08749142.9A
Other languages
German (de)
French (fr)
Other versions
EP2152556A2 (en
Inventor
Stephan Weber
Hans HÄCKER
Frank RÖCKLE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Publication of EP2152556A2 publication Critical patent/EP2152556A2/en
Application granted granted Critical
Publication of EP2152556B1 publication Critical patent/EP2152556B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/0336—Noise absorbers by means of sound-absorbing materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/002—Air treatment devices
    • B60T17/008—Silencer devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00—Tool driving or impacting
    • Y10S173/02—Sound muffling

Definitions

  • the invention relates to a muffler for damping the outflow noise of compressed air from compressed air devices, in particular compressed air devices in vehicles according to the preamble of claim 1.
  • a muffler is from the DE 197 01 361 C1 known.
  • the DE 43 06 397 A1 shows a silencer for a flowing gaseous medium with a pot-like housing, having an inlet and outlet opening, wherein in the interior of the housing, a sound-absorbing layer of closed-cell plastic is arranged, which in turn is surrounded by a highly absorbent lining of an open-cell foam, which extends to the inner wall of the housing. Further, a filter cartridge is arranged inside the housing, which is embedded in the open-cell foam lining and protrudes up to the highly damping closed-cell foam layer.
  • the DE 29 04 529 A shows an air valve for a compressed air system with a silencer of two successive open-walled has through whose openings air passes. Both walls are arranged at a distance from each other and the space thus formed between the walls is at least partially filled with noise-damping filler.
  • a filler plastic foam mineral fibers, felt, steel wool or a bed of plastic granules are proposed.
  • the object of the invention is therefore to improve the silencer of the type mentioned in that compressed air noise is attenuated more. This object is achieved by the features specified in the protection claim 1. Advantageous embodiments and further developments of the innovation can be found in the dependent claims.
  • the basic principle of the innovation is to arrange a layer of fibrous material between the filter cartridge of wound knitted material and the inner wall of the housing.
  • This layer may be a felt mat with fibrous material wrapped around the filter cartridge of the knitted material.
  • the layer of fibrous material may also be applied in the form of flakes adhered to the inner wall of the housing.
  • the fibers of the fibrous material are polyamide fibers. They have about a maximum length of 5mm, with the thickness of the layer of fibrous material in the order of 1 to 3mm.
  • the layer of fibrous material can only rest against the pot jacket. But it can also rest on the bottom of the pot.
  • this additional layer of fibrous material dampens vibrations of the knitted-material cartridge and / or decouples the knitted-material cartridge from the housing.
  • vibrations of the knitted material are not transmitted directly to the housing inner wall and thus the entire housing, but kept away from the housing by the fibrous material, which has so far poor sound conduction properties.
  • the fibers are predominantly oriented so that they are inclined to the housing wall. They are thus neither parallel to the housing wall nor are they perpendicular thereto.
  • the individual fibers of the layer of fibrous material are mainly subjected to bending and have good vibration damping properties.
  • the silencer of Fig. 1 has a pot-like housing 1 with a cylindrical Topfmantel 2 and a pot bottom 3.
  • the cup-shaped housing is closed by a lid 4 having an inlet opening 5 for compressed air from a compressed air device.
  • the lid 4 is fixed in any known manner to the cup-shaped housing 1, for example, screwed or connected to a latch or snap closure.
  • the bottom of the pot 3 has a plurality of outlet openings 6, which are, for example, star-shaped rectilinear slots.
  • a cartridge 7 is disposed of a serving for noise reduction sound absorption material in the form of a filter fabric.
  • the fabric is two-ply, as indicated by the different hatching.
  • a layer of fibrous material 8 is arranged between the cartridge 7 and the inner wall of the housing 1. This layer touches at least the pot jacket 2 and the outer circumference of the cartridge 7. However, it can also be arranged in addition between the bottom of the pot 3 and the bottom facing end face 9 of the cartridge 7.
  • the fibrous material 8 consists in a first embodiment of the invention of a felt mat with matted individual fibers.
  • these fibers are polyamide fibers.
  • they have a maximum length of 5mm, wherein the layer thickness of the layer of fibrous material 8 is of the order of 1 to 3mm and preferably 2mm.
  • the majority of the fibers of the fibrous material 8 is arranged obliquely to the respective adjacent wall of the housing 1.
  • the layer of fibrous material 8 may also be attached in the form of fiber flakes to the inner wall of the housing.
  • the inner wall of the housing is first etched and the fiber flakes are then applied and connected by an adhesive to the housing inner wall.
  • the layer of fibrous material 8 thus causes a decoupling between the cartridge of the knitted material and the housing 1, so that the vibrations emanating from the knitted material are not transmitted directly to the housing 1. In addition, it is believed that too Vibrations of the cartridge 7 are additionally attenuated. In summary, the layer of fibrous material achieves a significant improvement in sound attenuation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Exhaust Silencers (AREA)
  • Pipe Accessories (AREA)
  • Knitting Of Fabric (AREA)
  • Nonwoven Fabrics (AREA)
  • Filtering Materials (AREA)

Description

Die Erfindung bezieht sich auf einen Schalldämpfer zum Dämpfen des Ausströmgeräusches von Druckluft aus Druckluftgeräten, insbesondere Druckluftgeräten in Fahrzeugen gemäß dem Oberbegriff des Patentanspruches 1. Ein solcher Schalldämpfer ist aus der DE 197 01 361 C1 bekannt.The invention relates to a muffler for damping the outflow noise of compressed air from compressed air devices, in particular compressed air devices in vehicles according to the preamble of claim 1. Such a muffler is from the DE 197 01 361 C1 known.

Zum Ableiten von Druckluft und Entspannen derselben sind Schall- oder Geräuschdämpfer vorgesehen, die für Druckluftanlagen, insbesondere von Fahrzeugen, geeignet sind. Sie bestehen im allgemeinen aus einem topfartigen Gehäuse, das mit Schallschluckmaterial gefüllt ist. Das Gehäuse hat eine Einlaßöffnung und eine Auslaßöffnung, wobei die Auslaßöffnung in vielen Fällen am Topfboden angeordnet ist. Bei der DE 197 01 361 C1 sind zusätzlich noch Nebenluftwege vorgesehen, die beim Zusetzen des Schallschluckmaterials, sei es durch Verunreinigungen und/oder gefrierende Nässe, wirksam sind. Das Schallschluckmaterial ist ein das topfartige Gehäuse vollständig ausfüllendes Filtergestrick. Üblich ist es, ein solches gestricktes, meist schlauchförmiges Material ein- oder zweilagig zylindrisch zu wickeln und eine so gewickelte Filterpatrone in das Innenvolumen des topfartigen Gehäuses einzusetzen. Bei der Freifeld-Fahrzeug-Geräuschmessung nach der Richtlinie 70/157 EWG wird mit einem solchem Schalldämpfer ein Schalldruckpegel von 72dB(A) erreicht.For deriving compressed air and relaxing the same sound or noise damper are provided which are suitable for compressed air systems, especially of vehicles. They generally consist of a pot-like housing which is filled with sound absorption material. The housing has an inlet opening and an outlet opening, wherein the outlet opening is arranged in many cases on the bottom of the pot. In the DE 197 01 361 C1 In addition, secondary air paths are provided, which are effective in adding the sound-absorbing material, be it through impurities and / or freezing moisture. The Schallschluckmaterial is a cup-like housing completely filling filter fabric. It is customary to wrap such a knitted, usually tubular material one or two layers cylindrical and to use a wound filter cartridge in the internal volume of the pot-like housing. In the free-field vehicle noise measurement according to Directive 70/157 EEC is achieved with such a silencer a sound pressure level of 72 dB (A).

Die DE 43 06 397 A1 zeigt einen Schalldämpfer für ein strömendes gasförmiges Medium mit einem topfartigen Gehäuse, das eine Einlaß- und Auslaßöffnung aufweist, wobei im Innenraum des Gehäuses eine schalldämpfende Schicht aus geschlossenporigem Kunststoff angeordnet ist, die ihrerseits von einer hochabsorbierenden Auskleidung aus einem offenporigem Schaumstoff umgeben ist, der bis zur Innenwand des Gehäuses verläuft. Weiter ist im Inneren des Gehäuses eine Filterpatrone angeordnet, die in die offenporige Schaumstoffauskleidung eingebettet ist und bis zur der hochdämpfenden geschlossenporigen Schaumstoffschicht ragt.The DE 43 06 397 A1 shows a silencer for a flowing gaseous medium with a pot-like housing, having an inlet and outlet opening, wherein in the interior of the housing, a sound-absorbing layer of closed-cell plastic is arranged, which in turn is surrounded by a highly absorbent lining of an open-cell foam, which extends to the inner wall of the housing. Further, a filter cartridge is arranged inside the housing, which is embedded in the open-cell foam lining and protrudes up to the highly damping closed-cell foam layer.

Die DE 29 04 529 A zeigt ein Luftventil für eine Druckluftanlage mit einem Geräuschdämpfer der zwei hintereinander geschaltete durchbrochene Wandungen aufweist, durch deren Durchbrechungen Luft hindurchtritt. Beide Wandungen sind im Abstand zueinander angeordnet und der auf diese Weise zwischen den Wandungen gebildete Raum ist zumindest teilweise mit geräuschdämpfenden Füllstoff gefüllt. Als Füllstoff werden Kunststoffschaum, Mineralfasern, Filz, Stahlwolle oder eine Schüttung aus Kunststoffgranulat vorgeschlagen.The DE 29 04 529 A shows an air valve for a compressed air system with a silencer of two successive open-walled has through whose openings air passes. Both walls are arranged at a distance from each other and the space thus formed between the walls is at least partially filled with noise-damping filler. As a filler plastic foam, mineral fibers, felt, steel wool or a bed of plastic granules are proposed.

Wünschenswert ist es, die Schalldämpfungseigenschaften weiter zu verbessern. Aufgabe der Erfindung ist es daher, den Schalldämpfer der eingangs genannten Art dahingehend zu verbessern, daß Druckluftgeräusche stärker gedämpft werden. Diese Aufgabe wird durch die im Schutzanspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Neuerung sind den Unteransprüchen zu entnehmen.It is desirable to further improve the sound damping properties. The object of the invention is therefore to improve the silencer of the type mentioned in that compressed air noise is attenuated more. This object is achieved by the features specified in the protection claim 1. Advantageous embodiments and further developments of the innovation can be found in the dependent claims.

Das Grundprinzip der Neuerung besteht darin, zwischen die Filterpatrone aus gewickeltem gestricktem Material und die Innenwand des Gehäuses eine Schicht aus faserigem Material anzuordnen. Diese Schicht kann eine Filzmatte mit faserigem Material sein, die um die Filterpatrone aus dem gestrickten Material herumgewickelt ist. Die Schicht aus faserigem Material kann auch in Form von Flocken aufgebracht sein, die an der Innenwandung des Gehäuses angeklebt ist.The basic principle of the innovation is to arrange a layer of fibrous material between the filter cartridge of wound knitted material and the inner wall of the housing. This layer may be a felt mat with fibrous material wrapped around the filter cartridge of the knitted material. The layer of fibrous material may also be applied in the form of flakes adhered to the inner wall of the housing.

Vorzugsweise sind die Fasern des faserigen Materials Polyamidfasern. Sie haben etwa eine maximale Länge von 5mm, wobei die Dicke der Schicht aus faserigem Material in der Größenordnung von 1 bis 3mm liegt. Die Schicht aus faserigem Material kann nur an dem Topfmantel anliegen. Sie kann aber zusätzlich auch am Topfboden anliegen.Preferably, the fibers of the fibrous material are polyamide fibers. They have about a maximum length of 5mm, with the thickness of the layer of fibrous material in the order of 1 to 3mm. The layer of fibrous material can only rest against the pot jacket. But it can also rest on the bottom of the pot.

Es wird angenommen, daß diese zusätzliche Schicht aus faserigem Material Schwingungen der Patrone aus gestricktem Material dämpft und/oder die Patrone aus gestricktem Material vom Gehäuse entkoppelt. Damit werden Schwingungen des gestrickten Materials nicht direkt auf die Gehäuseinnenwand und damit das gesamte Gehäuse übertragen, sondern durch das faserige Material, das insoweit schlechte Schalleitungseigenschaften hat, vom Gehäuse ferngehalten. Die Fasern sind dabei überwiegend so ausgerichtet, daß sie schräg zur Gehäusewandung stehen. Sie liegen also weder parallel zur Gehäusewandung noch stehen sie senkrecht dazu. Damit werden die einzelnen Fasern der Schicht aus faserigem Material überwiegend auf Biegung beansprucht und haben dabei gute Schwingungsdämpfungseigenschaften.It is believed that this additional layer of fibrous material dampens vibrations of the knitted-material cartridge and / or decouples the knitted-material cartridge from the housing. Thus, vibrations of the knitted material are not transmitted directly to the housing inner wall and thus the entire housing, but kept away from the housing by the fibrous material, which has so far poor sound conduction properties. The fibers are predominantly oriented so that they are inclined to the housing wall. They are thus neither parallel to the housing wall nor are they perpendicular thereto. Thus, the individual fibers of the layer of fibrous material are mainly subjected to bending and have good vibration damping properties.

Versuche mit einem Schalldämpfer nach der Neuerung ergaben einen Schalldruckpegel in der Freifeld-Fahrzeug-Geräuschmessung nach der oben genannten Richtlinie 70/157 EWG von 69dB(A). Somit wurde gegenüber dem Stand der Technik eine Verbesserung von 3dB(A) erreicht.Experiments with a silencer after the innovation gave a sound pressure level in the free-field vehicle noise measurement according to the above-mentioned Directive 70/157 EEC of 69dB (A). Thus, an improvement of 3dB (A) has been achieved over the prior art.

Im folgenden wird die Neuerung anhand eines Ausführungsbeispieles im Zusammenhang mit der Zeichnung ausführlicher beschrieben. Es zeigt:

Fig. 1
Einen schematischen Querschnitt eines Schalldämpfers nach der Neuerung; und
Fig. 2
einen Schnitt längs der Linie II-II der Fig. 1 und damit eine geschnittene Draufsicht auf das topfartige Gehäuse des Schalldämpfers.
In the following the innovation will be described in more detail with reference to an embodiment in conjunction with the drawings. It shows:
Fig. 1
A schematic cross section of a muffler after the innovation; and
Fig. 2
a section along the line II-II of Fig. 1 and thus a sectional plan view of the pot-like housing of the muffler.

Der Schalldämpfer der Fig. 1 hat ein topfartiges Gehäuse 1 mit einem zylindrischen Topfmantel 2 und einem Topfboden 3. Das topfartige Gehäuse ist durch einen Deckel 4 verschlossen, der eine Einlaßöffnung 5 für Druckluft aus einem Druckluftgerät aufweist. Der Deckel 4 wird in irgendeiner bekannten Weise an dem topfartigen Gehäuse 1 befestigt, beispielsweise aufgeschraubt oder mit einem Rast- bzw. Schnappverschluß verbunden. Der Topfboden 3 hat mehrere Auslaßöffnungen 6, die beispielsweise sternförmig verlaufende geradlinige Schlitze sind.The silencer of Fig. 1 has a pot-like housing 1 with a cylindrical Topfmantel 2 and a pot bottom 3. The cup-shaped housing is closed by a lid 4 having an inlet opening 5 for compressed air from a compressed air device. The lid 4 is fixed in any known manner to the cup-shaped housing 1, for example, screwed or connected to a latch or snap closure. The bottom of the pot 3 has a plurality of outlet openings 6, which are, for example, star-shaped rectilinear slots.

Im Innenraum des Gehäuses 1 ist eine Patrone 7 eines zur Geräuschdämmung dienenden Schallschluckmaterials in Form eines Filtergestrickes angeordnet. Wie im Stand der Technik bekannt, wird hierfür gestricktes Bandmaterial oder gewalztes schlauchförmiges Gestrick ein- oder mehrlagig gewickelt, so daß sich im wesentlichen ein zylindrischer Körper ergibt. Im dargestellten Ausführungsbeispiel ist das Gestrick zweilagig, wie durch die unterschiedliche Schraffur angedeutet.In the interior of the housing 1, a cartridge 7 is disposed of a serving for noise reduction sound absorption material in the form of a filter fabric. Known as in the prior art, this knitted strip material or rolled tubular fabric wound one or more layers, so as to give a substantially cylindrical body. in the illustrated embodiment, the fabric is two-ply, as indicated by the different hatching.

Zur Verbesserung der Schalldämpfungseigenschaften ist zwischen der Patrone 7 und der Innenwandung des Gehäuses 1 eine Schicht aus faserigem Material 8 angeordnet. Diese Schicht berührt zumindest den Topfmantel 2 und den Außenumfang der Patrone 7. Sie kann aber auch zusätzlich zwischen dem Topfboden 3 und der zum Boden weisenden Stirnseite 9 der Patrone 7 angeordnet sein.To improve the sound damping properties, a layer of fibrous material 8 is arranged between the cartridge 7 and the inner wall of the housing 1. This layer touches at least the pot jacket 2 and the outer circumference of the cartridge 7. However, it can also be arranged in addition between the bottom of the pot 3 and the bottom facing end face 9 of the cartridge 7.

Das faserige Material 8 besteht bei einem ersten Ausführungsbeispiel der Erfindung aus einer Filzmatte mit verfilzten Einzelfasern. Vorzugsweise sind diese Fasern Polyamidfasern. Vorzugsweise haben sie eine maximale Länge von 5mm, wobei die Schichtdicke der Schicht aus faserigem Material 8 in der Größenordnung von 1 bis 3mm liegt und vorzugsweise 2mm beträgt.The fibrous material 8 consists in a first embodiment of the invention of a felt mat with matted individual fibers. Preferably, these fibers are polyamide fibers. Preferably, they have a maximum length of 5mm, wherein the layer thickness of the layer of fibrous material 8 is of the order of 1 to 3mm and preferably 2mm.

Der überwiegende Anteil der Fasern des faserigen Materials 8 ist schräg zur jeweils benachbarten Wand des Gehäuses 1 angeordnet.The majority of the fibers of the fibrous material 8 is arranged obliquely to the respective adjacent wall of the housing 1.

Nach einem anderen Ausführungsbeispiel der Erfindung kann die Schicht aus faserigem Material 8 auch in Form von Faserflocken an der Innenwand des Gehäuses angebracht sein. Hierzu wird in der Praxis die Innenwand des Gehäuses zunächst angeätzt und die Faserflocken werden dann aufgebracht und durch einen Klebstoff mit der Gehäuseinnenwand verbunden.According to another embodiment of the invention, the layer of fibrous material 8 may also be attached in the form of fiber flakes to the inner wall of the housing. For this purpose, in practice, the inner wall of the housing is first etched and the fiber flakes are then applied and connected by an adhesive to the housing inner wall.

Die Schicht aus faserigem Material 8 bewirkt somit eine Entkopplung zwischen der Patrone aus dem gestrickten Material und dem Gehäuse 1, so daß die von dem gestrickten Material ausgehenden Schwingungen nicht unmittelbar auf das Gehäuse 1 übertragen werden. Zusätzlich wird angenommen, daß auch Schwingungen der Patrone 7 zusätzlich gedämpft werden. Zusammenfassend wird durch die Schicht aus faserigem Material eine erhebliche Verbesserung der Schalldämpfung erreicht.The layer of fibrous material 8 thus causes a decoupling between the cartridge of the knitted material and the housing 1, so that the vibrations emanating from the knitted material are not transmitted directly to the housing 1. In addition, it is believed that too Vibrations of the cartridge 7 are additionally attenuated. In summary, the layer of fibrous material achieves a significant improvement in sound attenuation.

Claims (8)

  1. Silencer for damping the outflow noise of compressed air from compressed air appliances, in particular compressed air appliances of vehicles, comprising an inlet port (5), at least one outlet port (6) and a pot-like housing (1) which is arranged between these ports and which has a pot casing (2) and a pot base (3), a sound-absorbing material in the form of a cartridge (7) of a filter knit, serving for noise damping, being arranged in the interior of the pot-like housing (1), characterised in that a layer of fibrous material (8) is arranged between the cartridge (7) and the pot casing (2), and in that the predominant part of the fibrous material (8) is arranged at an angle to the pot casing (2).
  2. Silencer according to claim 1, characterised in that the fibrous material (8) is wound in the form of a felt mat around the outer circumference of the filter knit.
  3. Silencer according to claim 1, characterised in that the layer of fibrous material (8) is additionally arranged on the pot base (3), and in that the predominant part of the fibrous material (8) is arranged at an angle to the pot base (3).
  4. Silencer according to any of claims 1 to 3, characterised in that the layer of fibrous material (8) is applied in flock form to the pot casing (2) and/or to the pot base (3).
  5. Silencer according to claim 4, characterised in that layer of fibrous material (8) is glued on.
  6. Silencer according to any of claims 1 to 5, characterised in that the fibres of the fibrous material (8) are polyamide fibres.
  7. Silencer according to any of claims 1 to 6, characterised in that the fibres of the fibrous material (8) have a maximum length of 5 mm.
  8. Silencer according to any of claims 1 to 7, characterised in that the layer of fibrous material (8) has a thickness of 1 mm to 3 mm, in particular of 2 mm.
EP08749142.9A 2007-05-09 2008-04-25 Silencer Not-in-force EP2152556B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202007006627U DE202007006627U1 (en) 2007-05-09 2007-05-09 Sound absorber for pneumatic device of vehicle, has housing arranged between inlet opening and outlet opening, and layer of fibrous material arranged between cartridge and pot casing
PCT/EP2008/003364 WO2008138465A2 (en) 2007-05-09 2008-04-25 Silencer

Publications (2)

Publication Number Publication Date
EP2152556A2 EP2152556A2 (en) 2010-02-17
EP2152556B1 true EP2152556B1 (en) 2014-06-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08749142.9A Not-in-force EP2152556B1 (en) 2007-05-09 2008-04-25 Silencer

Country Status (7)

Country Link
US (1) US8191675B2 (en)
EP (1) EP2152556B1 (en)
JP (1) JP2010526244A (en)
CN (1) CN101674963B (en)
DE (1) DE202007006627U1 (en)
RU (1) RU2484267C2 (en)
WO (1) WO2008138465A2 (en)

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EP3034666A1 (en) 2014-12-17 2016-06-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Insulating and filter material and its use as inert sound-absorbing material
WO2017009443A1 (en) 2015-07-16 2017-01-19 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Sound attenuator system
DE102015111512A1 (en) 2015-07-16 2017-01-19 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH silencer

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DE102011111625A1 (en) * 2011-08-25 2013-02-28 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Sound damping device for an air drying system of a compressed air supply system
CN102979986A (en) * 2012-11-25 2013-03-20 蚌埠新奥燃气有限公司 Muffling and antistaticAntistatic exhaust nozzle capable of muffling
DE102013013281A1 (en) * 2013-08-09 2015-02-12 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Noise-reduced silencer for an air treatment plant
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DE102016100140A1 (en) 2016-01-05 2017-07-06 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Silencer for a compressed air system of a vehicle, in particular a commercial vehicle
DE102016100139A1 (en) * 2016-01-05 2017-07-06 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Silencer for a compressed air system of a vehicle, in particular commercial vehicle
DE102016218917B3 (en) * 2016-09-29 2018-01-11 Hansgrohe Se Flow restrictor and sanitary shower
RU2690894C1 (en) * 2018-06-09 2019-06-06 Российская Федерация, от имени которой выступает Государственная корпорация по космической деятельности "РОСКОСМОС" Silencer
DE102019101556A1 (en) * 2019-01-23 2020-07-23 Wabco Gmbh Vent cap on a solenoid valve in compressed air systems, for example for vehicles
JP2023023378A (en) * 2021-08-05 2023-02-16 株式会社マキタ air compressor
EP4286231A1 (en) * 2022-06-02 2023-12-06 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Noise damper with at least one fibre mesh roll unit having at least two mesh density regions and method for producing a fibre mesh roll unit

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3034666A1 (en) 2014-12-17 2016-06-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Insulating and filter material and its use as inert sound-absorbing material
DE102014226266A1 (en) 2014-12-17 2016-06-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Insulating and filtering material and its use as an inert sound-absorbing material
WO2017009443A1 (en) 2015-07-16 2017-01-19 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Sound attenuator system
DE102015111512A1 (en) 2015-07-16 2017-01-19 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH silencer
DE102015111515A1 (en) 2015-07-16 2017-01-19 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Silencer system

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WO2008138465A3 (en) 2009-01-22
US8191675B2 (en) 2012-06-05
RU2009145533A (en) 2011-06-20
RU2484267C2 (en) 2013-06-10
DE202007006627U1 (en) 2007-07-19
CN101674963A (en) 2010-03-17
EP2152556A2 (en) 2010-02-17
JP2010526244A (en) 2010-07-29
CN101674963B (en) 2011-11-09
US20100140015A1 (en) 2010-06-10
WO2008138465A2 (en) 2008-11-20

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